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Finding the Fourth Proportional to 486.45, 671.45 and 300.22

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Solution

The fourth proportional to 486.45, 671.45 and 300.22 is: 414.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.45 : 671.45 = 300.22 : x
  2. Step 2: Convert to fraction form
    486.45/671.45 = 300.22/x
  3. Step 3: Cross multiply
    486.45x = 671.45 × 300.22
  4. Step 4: Simplify right side
    486.45x = 201,579.54
  5. Step 5: Solve for x
    x = 201,579.54/486.45
  6. Step 6: Final answer
    x = 414.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.